>> ATLAS is called ESOP Cup for the US market The ATLAS acetabular cup is a cementless elastic acetabular cup. We have more than 20 years’ experience and more than 100,000 implants have been performed throughout the world, including in the USA. The ATLAS acetabular cup comes in different versions of metal-back, with or without teeth, with or without screw holes, for a range that is sized in 2 mm increments, ranging from 40 to 74 mm so as to adapt to as many patients and indications as possible. ATLAS Insert PolyéthylèneThere is also a large range of inserts, made of polyethylene (UHMWPE), highly cross-linked polyethylene or alumina sandwich. The internal diameters of these inserts are 22.22, 28 and 32 mm for the flat-rimmed version, with a posterior or anti-dislocation wall.